diff --git a/yarn.lock b/yarn.lock
index 77123e0..15cbadf 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -703,9 +703,9 @@ acorn-walk@^6.0.1:
   integrity sha1-02O2b1+sXwGP+cOh57b44xDMORM=
 
 acorn@^5.5.3:
-  version "5.7.3"
-  resolved "http://registry.npm.taobao.org/acorn/download/acorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
-  integrity sha1-Z6ojG/iBKXS4UjWpZ3Hra9B+onk=
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
+  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
 
 acorn@^6.0.1:
   version "6.1.0"